One reason Israel hasn't joined in the war (except for a few ALBMs in "response" to Iran's salvo after Israel bombed Beirut) is because their own BMD magazine is approaching empty, and w/o US BMD there's legitimately nothing they can do to prevent hits
ShipwreckA senior U.S. military official warned the Pentagon that there are not enough naval forces to continue defending Israel against ballistic missiles.-WaPo